Rounding a variable to two decimal places C# [dupl

Question

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How do you round a number to two decimal places in C#? (15 answers)

Closed 7 months ago.

I am interested in how to round variables to two decimal places. In the example below, the bonus is usually a number with four decimal places. Is there any way to ensure the pay variable is always rounded to two decimal places?

  pay = 200 + bonus;
  Console.WriteLine(pay);

Answer 1

Pay attention on fact that Round rounds.

So (I don't know if it matters in your industry or not), but:

float a = 12.345f;
Math.Round(a,2);

//result:12,35, and NOT 12.34 !

To make it more precise for your case we can do something like this:

int aInt = (int)(a*100);
float aFloat= aInt /100.0f;
//result:12,34 

Answer 2

Use Math.Round and specify the number of decimal places.

Math.Round(pay,2);

Math.Round Method (Double, Int32)

Rounds a double-precision floating-point value to a specified number of fractional digits.

Or Math.Round Method (Decimal, Int32)

Rounds a decimal value to a specified number of fractional digits.